Infiniti Q45. Manual - part 574

SERVICE DATA AND SPECIFICATIONS (SDS)

EM-113

C

D

E

F

G

H

I

J

K

L

M

A

EM

Valve Lifter

Unit: mm (in)

Valve Spring

2.69 (0.1059)

269

2.70 (0.1063)

270

2.71 (0.1067)

271

2.72 (0.1071)

272

2.73 (0.1075)

273

2.74 (0.1079)

274

2.75 (0.1083)

275

2.76 (0.1087)

276

2.77 (0.1091)

277

2.78 (0.1094)

278

2.79 (0.1098)

279

2.80 (0.1102)

280

2.81 (0.1106)

281

2.82 (0.1110)

282

2.83 (0.1114)

283

2.84 (0.1118)

284

2.85 (0.1122)

285

2.86 (0.1126)

286

2.87 (0.1130)

287

2.88 (0.1134)

288

2.89 (0.1138)

289

2.90 (0.1142)

290

2.91 (0.1146)

291

2.92 (0.1150)

292

2.93 (0.1154)

293

2.94 (0.1157)

294

2.95 (0.1161)

295

Thickness

mm (in)

Identification mark

SEM966E

Items

Standard

Valve lifter outer diameter

33.965 - 33.975 (1.3372 - 1.3376)

Valve lifter hole diameter

34.000 - 34.016 (1.3386 - 1.3392)

Valve lifter clearance

0.025 - 0.051 (0.0010 - 0.0020)

Free height 

mm (in)

46.35 - 46.85 (1.8247 - 1.8444)

Load 

N (kg, lb) at height mm (in)

Installation

165 - 189 (16.8 - 19.3, 37 - 42) at 33.8 (1.331)

Valve open

290 - 330 (29.6 - 33.7, 65 - 74) at 24.4 (0.961)

Squareness 

mm (in)

Limit

2.0 (0.079)

EM-114

SERVICE DATA AND SPECIFICATIONS (SDS)

Valve Guide

Unit: mm (in)

Valve Seat

Unit: mm (in)

Items

Standard

Service

Valve guide

Outer diameter

10.023 - 10.034 (0.3946 - 0.3950)

10.223 - 10.234 (0.4025 - 0.4029)

Inner diameter (Finished size)

6.000 - 6.018 (0.2362 - 0.2369)

Cylinder head valve guide hole diameter

9.975 - 9.996 (0.3927 - 0.3935)

10.175 - 10.196 (0.4006 - 0.4014)

Interference fit of valve guide

0.027 - 0.059 (0.0011 - 0.0023)

Standard

Limit

Valve guide clearance

Intake

0.020 - 0.046 (0.0008 - 0.0018)

0.08 (0.003)

Exhaust

0.030 - 0.056 (0.0012 - 0.0022)

0.10 (0.004)

Projection length “L”

Intake

10.1 - 10.3 (0.398 - 0.406)

—

Exhaust

10.0 - 10.4 (0.394 - 0.409)

—

PBIC0184E

Items

Standard

Service

Cylinder head seat recess diameter (D)

Intake

37.000 - 37.016 (1.4567 - 1.4573)

37.500 - 37.516 (1.4764 - 1.4770)

Exhaust

32.200 - 32.216 (1.2677 - 1.2683)

32.700 - 32.716 (1.2874 - 1.2880)

Valve seat interference fit

Intake

0.081 - 0.113 (0.0032 - 0.0044)

Exhaust

0.064 - 0.096 (0.0025 - 0.0038)

Valve seat outer diameter (d)

Intake

37.097 - 37.113 (1.4605 - 1.4611)

37.597 - 37.613 (1.4802 - 1.4808)

Exhaust

32.280 - 32.296 (1.2709 - 1.2715)

32.780 - 32.796 (1.2905 - 1.2912)

PBIC2379E

SERVICE DATA AND SPECIFICATIONS (SDS)

EM-115

C

D

E

F

G

H

I

J

K

L

M

A

EM

CAMSHAFT AND CAMSHAFT BEARING

Unit: mm (in)

*: Total indicator reading

CYLINDER HEAD

Unit: mm (in)

Items

Standard

Limit

Camshaft runout [TIR*]

—

0.02 (0.0008)

Cam height “A”

Intake

44.865 - 45.055 (1.7663 - 1.7738)

Cam wear

Exhaust

43.925 - 44.115 (1.7293 - 1.7368)

0.2 (0.008)

Camshaft journal outer diameter

No.1

25.938 - 25.955 (1.0212 - 1.0218)

—

No.2, 3, 4, 5

25.953 - 25.970 (1.0218 - 1.0224)

—

Camshaft bracket inner diameter

26.000 - 26.021 (1.0236 - 1.0244)

—

Camshaft journal oil clearance

No.1

0.045 - 0.083 (0.0018 - 0.0033)

—

No.2, 3, 4, 5

0.030 - 0.068 (0.0012 - 0.0027)

—

Camshaft end play

0.115 - 0.188 (0.0045 - 0.0074)

—

Camshaft sprocket runout [TIR*]

 —

0.15 (0.0059)

SEM671

Items

Standard

Limit

Cylinder head distortion

Less than 0.03 (0.0012)

0.1 (0.004)

PBIC0183E

EM-116

SERVICE DATA AND SPECIFICATIONS (SDS)

CYLINDER BLOCK

Unit: mm (in)

Distortion

Standard

Less than 0.03 (0.0012)

Limit

0.1 (0.004)

Cylinder bore

Inner diame-
ter

Standard

Grade No. 1

93.000 - 93.010 (3.6614 - 3.6618)

Grade No. 2

93.010 - 93.020 (3.6618 - 3.6622)

Grade No. 3

93.020 - 93.030 (3.6622 - 3.6626)

Wear limit

0.20 (0.0079)

Out-of-round (Difference between “X” and “Y”)

0.015 (0.0006)

Taper (Difference between “A” and “C”)

0.010 (0.0004)

Cylinder block main bearing 
housing inner diameter grade
(Without bearing)

Grade No. A
Grade No. B
Grade No. C
Grade No. D
Grade No. E
Grade No. F
Grade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N
Grade No. P
Grade No. R
Grade No. S
Grade No. T
Grade No. U
Grade No. V
Grade No. W
Grade No. X
Grade No. Y
Grade No. 1
Grade No. 2

68.944 - 68.945 (2.7143 - 2.7144)
68.945 - 68.946 (2.7144 - 2.7144)
68.946 - 68.947 (2.7144 - 2.7144)
68.947 - 68.948 (2.7144 - 2.7145)
68.948 - 68.949 (2.7145 - 2.7145)
68.949 - 68.950 (2.7145 - 2.7146)
68.950 - 68.951 (2.7146 - 2.7146)
68.951 - 68.952 (2.7146 - 2.7146)
68.952 - 68.953 (2.7146 - 2.7147)
68.953 - 68.954 (2.7147 - 2.7147)
68.954 - 68.955 (2.7147 - 2.7148)
68.955 - 68.956 (2.7148 - 2.7148)
68.956 - 68.957 (2.7148 - 2.7148)
68.957 - 68.958 (2.7148 - 2.7149)
68.958 - 68.959 (2.7149 - 2.7149)
68.959 - 68.960 (2.7149 - 2.7150)
68.960 - 68.961 (2.7150 - 2.7150)
68.961 - 68.962 (2.7150 - 2.7150)
68.962 - 68.963 (2.7150 - 2.7151)
68.963 - 68.964 (2.7151 - 2.7151)
68.964 - 68.965 (2.7151 - 2.7152)
68.965 - 68.966 (2.7152 - 2.7152)
68.966 - 68.967 (2.7152 - 2.7152)
68.967 - 68.968 (2.7152 - 2.7153)

Difference in inner diameter 
between cylinders

Standard

0.03 (0.0012)

PBIC0123E